import csv

with open("./datas.csv", mode='w', newline="") as csvfile:
    writer = csv.writer(csvfile)
    writer.writerow(['id', 'name', 'age'])
    writer.writerow(['ll', 'lll', 'lll', 'llll'])
    writer.writerow(['pp', 'ppp', 'ppp'])
    writer.writerow(['ss', 'sss', 'sss'])
    writer.writerows([['ll', 'lll', 'lll'], ['pp', 'ppp', 'ppp', 'ppppp'], ['ss', 'sss', 'sss']])
